:57 - We see Female Shepard using a new and very large weapon (probably the M-76 Revenant Light Machine Gun)

:59 - We get a good shot here of a character that may be Kai Leng from the novels. It was confirmed that he would be in the games, but we have not seen him until now.

1:01 - Here Shepard is on a mysterious planet, the earth is crumbling and she is carrying two weapons on her back. As the M8 Avenger Assult Rifle falls we get a look at the M-76 Revenant Light Machine Gun and the M-98 Widow Anti-Material Rifle on her back.

1:02 - We finally see Mass Effect 3's model for Miranda Lawson for the first time with Male Shepard and Liara. She is using biotics to push an unidentified human male out of a window. This man may be Miranda's Father.

1:05 - Here we see the Migrant Fleet of the Quarian race on flotilla ships attacking something. Some fans hypothesize that they're taking back their planet from the Geth, as we get a better shot of this same scene in the Integrated Storytelling trailer.

1:08 -Captain David Anderson reinstates Shepard and throws her her dogtags, another main Plot point of Mass Effect 3.

1:09 - We see a Harvester being blown to bits.

1:10 - We see Samara from the second game. She is seen in her post-loyalty outfit; it seems other returning characters are in their original outfits.

1:11 - Shepard stomps on one a Husk causing a bloody execution animation to play. This is some of the goriest content we've seen in a Mass Effect game.

1:12 - This was seen in an earlier trailer, but in the background we can see a Thresher Maw attacking.

1:13 - Shepard dodges a blast from a Reaper while holding a New Orbital Strike Weapon and finally she uses it to drop an orbital strike on the enemy. We also see the M-76 Revenant Light Machine Gun, the M-98 Widow Anti-Material Rifle, and the Arc Projector (heavy weapon) on her back.

:10 - The character shown here is Kai Leng from the novels Mass Effect: Retribution and Mass Effect: Deception. This character was revealed in the May 2011 issue of Game Informer. This is confirmed from The Art of the Mass Effect Universe book. Here we see a Cerberus logo on the character and arms that seem to be enhanced.

:26 - Here we see another mysterious Ninja character. The armor looks slightly different than what we saw the sniper wearing, but that same logo is again on the arms of this character. The flying sac characters were seen in the first level of the original Mass Effect.

:29 - The Geth have returned and seem to be angry. They look a lot different than in the last games. Perhaps they've upgraded or they are new Geth that came with the Reapers.

:30 - This new enemy type appears to be a female Reaper-infected Asari Husk. This enemy is called a Banshee, and some new enemies with gas sacks below them that we've never seen before. There are also two new enemy types with her that look like variations of the Vorcha. A Reaperized-version of the Gas Bag creatures we saw in the original Mass Effect can be seen here.

:33 - A massive army of Cerberus agents is chasing after Female Shepard. Included in the group is the walking the Cerberus mech called the Atlas.

:36 - The enemy shown here is called an Cannibal, a husk made from batarians.

:37 - Again we see the Turian but also shown is a Brute husk, which may be a Reaper-infected Krogan.

:38 - The Geth return and are attacking Shepard.

:39 - The Harvester, a dragon-like creature from Mass Effect 2, appears here. They sent the Klixen into battle during Grunt's loyalty mission and on Tarith during an N7 mission, this Harvester looks to be a Reaperized Husk.

:40 - Reaper-infected Rachni husks are shown here, but they look like they've been combined with Gas Sacks.

:42 - Many Reaper-infected races are shown here. The Krogan is not Wrex, because this is an enemy trailer, and he has no scar. It also is not Grunt as he does not have the same hue or face shape as Grunt. The Krogan does resemble Urdnot Wreav, who is Wrex's brother and takes over if Wrex is killed in Mass Effect.

:43 - The Krogen that is being chased by the Rachni has a Cerberus logo Shotgun seen when pulling off the still unknown bug.

:43 - The unknown bug could be an infected and modified Rachni worker or Space Beetle.

:40 - This is the first game where Shepard is thrown into a firefight without armor. Can probably only carry one weapon during this segment. Other armor advantages, like kinetic bariers and stat percentage increases, are most likely absent during this segment as well.

:48 - This is an attack on the Human Defense Committee ;at the beginning of the game, probably after they've grilled Sheperd over his past actions.

:56 - This is a different Biotic Barrier, similar to the one used in part of the Suicide Mission in Mass Effect 2.

1:01 - The mission seems to take place on the Asari homeworld of Thessia. This also shows Asari in more of an organized manner than in Mass Effect 1 and 2, where any Asari encountered were mercenaries, commandos, or Matriarch Benezia.

1:05 - The conversation selection wheel is the same with paragon choices on top and renegade on the bottom. The only change is the color scheme,which is now blue to match the Alliance just like ME1.

:13 - Picking weapons off dead bodies is a new feature in Mass Effect 3.

:13- Shepard picks up an M8 avenger which appeared in Mass Effect 2, but if you look closely the gun which had a scope on top in Mass Effect 2 no longer has one, which suggest you must now attach it at a workbench.

:17 - Many types of armor return from previous games: Including the Inferno Armor from Mass Effect 2, the Terminus Armor, the Collector Armor, and the classic N7 Armor and it's customization options. Choosing colors for armor is more user-friendly, as users will be able to see colors before applying them, compared to Mass Effect 2. At the same time, color customization is more varied than Mass Effect 2, with a greater amount of colors being used on one set of armor.

:38 - These are the new weapon loadouts for the Campaign. This will also be available in Multiplayer. We also see a weight readout for the weapon, another first for the Mass Effect series -- the weight of equipment has a minor affect on recharge speed.

:44 - High caliber barrel attachment applied to a pistol showing stat changes and description. Also of note is the remade Paragon/Renegade meter, with only one being used compared to Mass Effect 1 and 2.

:52 - Color of multiplayer characters is fully customizable & seems to have more aesthetic options with higher level characters.

:53 - It appears that different powers will be unlocked and customized, up to 3 will be equiped at a time. Credits will be used to purchase new weapons and equipment. It appears up to 6 weapons can be chosen from.